The TRUE drop-in ready barrel for the Sig Sauer P365-FUSE, designed for the 4.3″ P365-FUSE 9mm Models (also available for P365, 3.1 and P365XL 3.7″). TRUE barrels delivers unmatched accuracy, combining advanced cuts, chamfers, and an improved feed ramp designed to outperform OEM standards and to ensure reliable feeding of all types of ammunition designs including defensive ammo.